Route Redistribution Between OSPF and EIGRP

As discussed in the previous post, Router Redistribution is a technique that allows you to redistribute routes learned by one routing protocol or algorithm into another routing protocol or algorithm. We have also explained the detailed steps how to redistribute RIP routes into EIGRP. In this article, we are going to explain how to perform route redistribution between OSPF and EIGRP routing protocols. We would recommend you to visit the following articles before proceed to next.

We are going to use the following topology to demonstrate how to redistribute EIGRP routes into OSPF and OSPF routes into EIGRP. Use your favorite simulator (Cisco Packet Tracer or GNS3) to create the following topology and configure the appropriate IP addresses.

Perform OSPF and EIGRP Routings

Once you have configured the appropriate IP address on all the routers, the next step is to prepare your topology to perform route redistribution. For this, following steps are needed:

The following figure shows how to redistribute OSPF routes into EIGRP.

Once you have performed route redistribution between OSPF and EIGRP, move on to Router1 and view the routing table.

Router1#show ip route

What changes you have noticed?. In the above-mentioned figure, you can see that 20.0.0.0/8 and 192.168.1.0/24 networks are added through the External EIGRP routing algorithm. Now, view the routing table on Router3.

Router3#show ip route

In the preceding figure, you can see that 10.0.0.0/8 and 192.168.0.0/24 networks are added through the external OSPF protocol. Now, Router1 and Router3 can communicate to each other.

Hope, it helped you. If you get stuck anywhere during the process of route redistribution between OSPF and EIGRP. Please drop your queries in the comment box. It would be highly appreciable if you like and share this article.